prikaz prve stranice dokumenta Primjena regresijskog modela s potpornim vektorima u proračunu reaktorskog štita
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doctoral thesis
Primjena regresijskog modela s potpornim vektorima u proračunu reaktorskog štita
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2008. urn:nbn:hr:168:607342
Trontl, Krešimir
University of Zagreb
Faculty of Electrical Engineering and Computing
Department of Applied Physics

Institutional repository: FER Repository

Cite this document

Trontl, K. (2008). Primjena regresijskog modela s potpornim vektorima u proračunu reaktorskog štita (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:607342

Trontl, Krešimir. "Primjena regresijskog modela s potpornim vektorima u proračunu reaktorskog štita." Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2008. https://urn.nsk.hr/urn:nbn:hr:168:607342

Trontl, Krešimir. "Primjena regresijskog modela s potpornim vektorima u proračunu reaktorskog štita." Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2008. https://urn.nsk.hr/urn:nbn:hr:168:607342

Trontl, K. (2008). 'Primjena regresijskog modela s potpornim vektorima u proračunu reaktorskog štita', Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 19 December 2024, https://urn.nsk.hr/urn:nbn:hr:168:607342

Trontl K. Primjena regresijskog modela s potpornim vektorima u proračunu reaktorskog štita [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2008 [cited 2024 December 19] Available at: https://urn.nsk.hr/urn:nbn:hr:168:607342

K. Trontl, "Primjena regresijskog modela s potpornim vektorima u proračunu reaktorskog štita", Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2008. Available at: https://urn.nsk.hr/urn:nbn:hr:168:607342

Metadata
TitlePrimjena regresijskog modela s potpornim vektorima u proračunu reaktorskog štita
Title (english)Application of Support Vector Regression Model in Reactor Shielding Calculations
AuthorKrešimir Trontl
MentorDubravko Pevec (mentor)
MentorTomislav Šmuc (komentor)
Committee memberNikola Čavlina (predsjednik povjerenstva)
Committee memberDubravko Pevec (član povjerenstva)
Committee memberTomislav Šmuc (član povjerenstva)
Committee memberMile Baće (član povjerenstva)
Committee memberNenad Debrecin (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
(Department of Applied Physics)
Zagreb
Defense date and country2008-11-26, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Universal decimal classification
(UDC)		621.3 - Electrical engineering
Abstract
Za preliminirane inženjerske proračune brzine doza gama zračenja često se koristi aproksimativna metoda Greenovih funkcija, čija je preciznost uvelike određena točnošću faktora nakupljanja upotrijebljenih u proračunu. Faktori nakupljanja za jednoslojne štitove dobro su definirani i poznati, no prisutan je problem određivanja faktora nakupljanja višeslojnih štitova, koji se najčešće i susreću u praksi. Stoga je analizirana mogućnost primjene metode potpornih vektora za izgradnju regresijskog modela s potpornim vektorima (SVR modela) za određivanje faktora nakupljanja brzine doze gama zraka za višeslojne štitove, a s ciljem povećanja točnosti njihovog određivanja čime se povećava i točnost proračuna brzina doza. Izgradnja regresijskog modela za određivanje faktora nakupljanja provedena je kao klasični računarski eksperiment u kojem je složeni računarski program upotrijebljen za generaciju parova ulaz/izlaz na kojima algoritam metode potpornih vektora „uči“. Kako bi proces izgradnje bio optimalan definirana je procedura optimalnog razvoja modela, s naglaskom na metodama aktivnog učenja. Dobiveni regresijski model ugrađen je u računarski program QAD-CGGP i testiran na dva problema proračuna brzina doza gama zračenja. Rezultati testiranja pokazuju djelomično poboljšanje kvalitete proračuna, odnosno povećanje točnosti izračunatih brzina doza u usporedbi sa klasičnim pristupom koji se standardno primjenjuje kod QAD-CGGP programa.
Abstract (english)
The point-kernel method is a widely used practical tool for preliminary engineering gamma ray shielding calculations. The accuracy of the method is highly dependent on the accuracy of the buildup factors used in the calculations. Buildup factors for single-layer shields, comprised of a single material, are well known. On the other hand, buildup factors for stratified shields, commonly encountered in practical problems, represent a complex physical problem difficult to model. Therefore, the possibility of applying a support vector regression model for the determination of the multi-layer shield buildup factors has been analysed. Development of the regression model for the determination of buildup factors has been conducted as a classical computer experiment in which a complex computer code has been employed for the generation of input/output pairs on which support vector machine algorithm “learns“. In order to perform optimal development of the model, optimal development procedure has been defined, with particular attention placed on active learning methods. Obtained regression model has been incorporated into QAD-CGGP code and tested on two gamma radiation shielding problems. Testing results suggest partial improvement of the calculational quality, i.e., higher accuracy of the calculated dose rates compared to ones obtained by classical QAD-CGGP approach.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:607342
ProjectNumber: 036-0361590-1579
Title: Gospodarenje gorivom standardnih i naprednih nuklearnih reaktora
Leader: Dubravko Pevec
Jurisdiction: Croatia
Funder: MZOS
Funding stream: ZP
Study programmeTitle: Doctoral study programme "Electrical Engineering and Computing"
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti, po-dručje tehničkih znanosti (doktor/doktorica znanosti, po-dručje tehničkih znanosti)
Catalog URLhttp://lib.fer.hr/cgi-bin/koha/opac-detail.pl?biblionumber=33168
Type of resourceText
Extent108 str.
File originBorn digital
Access conditionsClosed access
Terms of useLicence In copyright icon
Created on2020-03-19 11:14:50